166604003 has 2 divisors, whose sum is σ = 166604004. Its totient is φ = 166604002.

The previous prime is 166603981. The next prime is 166604021. The reversal of 166604003 is 300406661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166604003 - 2¹² = 166599907 is a prime.

It is not a weakly prime, because it can be changed into another prime (166604803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83302001 + 83302002.

It is an arithmetic number, because the mean of its divisors is an integer number (83302002).

Almost surely, 2^166604003 is an apocalyptic number.

166604003 is a deficient number, since it is larger than the sum of its proper divisors (1).

166604003 is an equidigital number, since it uses as much as digits as its factorization.

166604003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 166604003 is about 12907.5173058183. The cubic root of 166604003 is about 550.2522292139.

The spelling of 166604003 in words is "one hundred sixty-six million, six hundred four thousand, three".